Is smoking weed cause ear ache and hearing loss?

Maybe indirectly: Smoking in any form is associated with an increase in ear infections in some. This is thought due to the irritation of the lining of the tube that drains mucus from the middle ear to the throat & allows air in.When that tube swells shut, mucus is trapped & any air absorbed creating a vacuum (like flying).That trapped mucus can feed germs if they enter the tube. Hearing loss is transient.

Maybe or coincidence: Smoking (inhaled smoke contains toxins, irritants, cancer-causing chemicals) of any kind is unhealthy. Weed is not needed for a normal life, in almost all cases (there may be rare exceptions). Ear symptoms may be a coincidence or may be related to the smoking. If the ear symptoms never return after one quits smoking, there probably is no damage. Otherwise, one's primary doctor can evaluate.